New Year's theme:
Set the system date to January 1st to see various things in the game change to
a New Year's theme.
Halloween theme:
Set the system date to October 31st to see various things in the game change
to a Halloween theme.
Thanksgiving theme:
Set the system date to the last hursday in November to see various things in
the game change to a Thanksgiving theme.
Christmas theme:
Set the system date to December 25th to see various things in the game change
to a Christmas theme.
Itchy And Scratchy cartoon:
Collect all cards in the game then go to Lisa's level. Go to the Android's
Dungeon. Talk to the Comic Book Guy and buy a ticket for the cartoon. Then,
go to the Aztec Theater to watch the cartoon.